• Title, Summary, Keyword: 환경방출 특성

Search Result 367, Processing Time 0.053 seconds

Emission Characteristics of Volatile Organic Compounds from Building Flooring Materials (건축용 바닥재로부터의 휘발성유기화합물 방출특성)

  • Yun, Joong-Seop;Lee, Myong-Hwa;Eom, Seok-Won;Kim, Min-Young;Kim, Jong-Ho;Kim, Shin-Do
    • Journal of Korean Society of Environmental Engineers
    • /
    • v.32 no.10
    • /
    • pp.973-978
    • /
    • 2010
  • The emission of volatile organic compounds (VOCs) from building materials is one of great concerns due to maintain airtight condition of a building to reduce energy consumption, and it causes the deterioration of indoor air quality. Therefore, the emission characterization of VOCs from building materials is necessary to improve indoor air quality. Emission characteristics of VOCs from a plywood flooring that is one of the most commonly used materials in an under-heating system, and from an adhesive that is generally used to stick a plywood flooring to a concrete floor were investigated using an emission chamber test in this study. It was found that the VOCs emission factor was dependent upon and proportional to indoor temperature, and the emission characteristics were closely related to the existing places and conditions of VOCs sources inside the building materials. Maximum emission factors of hexane and toluene from building materials were generally observed at the beginning, however, only that of toluene from a plywood flooring was shown after 6 hours from the beginning. It could be considered that the existing place and condition of toluene source inside a plywood flooring could influence on the VOCs emission. From this study, bake-out time more than 72 hours could be recommended before moving in to avoid the exposure to high concentration of VOCs emitted from an under-heating system.

Combution characteristics analysis of partition materials on public toilets (공공화장실 칸막이 재료의 연소특성 분석)

  • Chae, Hak-Byeong;Min, Jeong-Gi;Lee, Sang-Gwon;Jeong, Guk-Sam;Won, Jeong-Hun
    • Proceedings of the Korea Institute of Fire Science and Engineering Conference
    • /
    • /
    • pp.178-179
    • /
    • 2013
  • 본 연구에서는 현재 사용되고 있는 건축물 내의 화장실 칸막이 재료를 대상으로 ISO 5660-1 콘칼로리미터(Cone calorimeter) 실험을 실시하여 대상 실험 재료들의 연소 특성을 비교 평가 하였다. 모두 5종류의 실험체를 사용하였으며, 화재 발생시 연소 중요 평가항목인 착화시간(Time to ignition), 총 방출열량(Total heat release), 최고 열방출율(Peak heat release rate), 평균 열방출율(Mean heat release rate)을 중점적으로 평가하였다. 실험결과, 착화시간은 일반 합판패널에서 빠르게 일어났으며, 총 방출열량, 최고 열방출율, 평균 열방출율은 고밀도 압축패널에서 높게 나타난 것으로 분석되었다.

  • PDF

Characteristics for VOCs and aldehydes emission rates from architectural flooring (건축용 바닥재로부터의 VOCs와 Aldehydes 방출 특성)

  • Jang, Seong-Ki;Kim, Mi-Hyun;Seo, Soo-Yun;Lee, Woo-Suk;Lim, Jun-Ho;Lim, Jeong-Yun
    • Analytical Science and Technology
    • /
    • v.19 no.6
    • /
    • pp.544-552
    • /
    • 2006
  • Emission tests were carried out to investigate the characteristics of concentration according to flooring sort using small chamber method. The target Volatile Organic Compounds (VOC) included 27 individual compounds of environmental concern, which were determined by adsorption sampling and thermal desorption coupled with GC/MS method and by DNPH cartridge/HPLC method. The emission factor of Total Volatile Organic Compounds (TVOC) and Formaldehyde (HCHO) was detected $0.3mg/m^2{\cdot}h$ and $0.2mg/m^2{\cdot}h$ respectively, and the floorings of 37 (9 PVC Tile, 10 PVC Sheet, 18 Flooring) were satisfied emission standard. TVOC emission factor appeared in order of concentration of PVC Sheet, PVC Tile, and floor flooring, while HCHO was detected very high emission factor (as $0.4mg/m^2{\cdot}h$) at floor flooring above PVC series (as $0.001mg/m^2{\cdot}h$).

EMC Compatability Analysis on Geostationary Satellite (정지궤도 인공위성의 전자파 호환성 해석)

  • Chae, Tae-Byeong;Oh, Seung-Hyeub
    • Journal of the Korean Society for Aeronautical & Space Sciences
    • /
    • v.36 no.12
    • /
    • pp.1207-1215
    • /
    • 2008
  • Satellite generates a complex electromagnetic noise by conducted and radiated coupling effect of the various electrical instruments. This noise may cause serious problems on the satellite system. To minimize the electromagnetic coupling effects and maintain the system safety margin, system noise reduction technique should be applied from the beginning of the system design. The COMS system is evaluated by measuring the conducted noise on system electrical power leads at PSR(Power Supply Regulator) and verifying a 6 dB system safety margin under the complex noise environment with current injection. The radiated noise due to the complex transmit antenna configuration is evaluated by integrating all unit-level RE measurement results, and the RF compatibility between spacecraft and launch vehicle is analyzed with the above estimations. This paper describes the COMS EMC compatibility analysis with respect to each unit level EMC test results, and RF compatibility analysis between spacecraft and launch vehicle. The analyzed results will be reflected on FM(Flight Model) EMC test.

Emission Characteristics of Volatile Organic Compounds from Air Fresher using Small Emission Chamber (소형방출챔버를 이용한 방향제의 휘발성 유기화합물 방출특성에 관한 연구)

  • Jung, Young-Rim;Park, Hyun-Hee;Oh, Youn-Hee;Kim, Soon-Geun;Sohn, Jong-Ryeul;Kim, Sun-Hwa;Yu, Young-Jae;Bae, Gwi-Nam;Kim, Man-Goo
    • Journal of Korean Society of Environmental Engineers
    • /
    • v.33 no.3
    • /
    • pp.183-190
    • /
    • 2011
  • This study investigated the emissions characteristics of air freshener using small emission chamber method. The emission of VOCs from air freshener were determined in the small chambers in the temperature (25, $30({\pm}1)^{\circ}C$), relative humidity ($50{\pm}5%$), ventilation rate (0.3, 0.5, ($0.8({\pm}0.005)/hr$), and sample loading factor ($1.4{\sim}551.0g/m^2$) in this study. The emission tests from air freshener for sample loading factor resulted in TVOC emission rates of $0.7{\sim}64.4mg/m^2{\cdot}h$ after 5 hours. For most target VOCs such as limonene, ${\alpha}$-pinene and linalool, higher temperature and ventilation rate levels exhibited increased emission rates.

A Study on Volatile Organic Compounds(VOCs) and Formaldehyde(HCHO) Emission Characteristics from Furniture (가구에서 발생되는 VOCs와 Formaldehyde의 방출특성에 관한 연구)

  • 김신도;서병량;윤중섭
    • Proceedings of the Korea Air Pollution Research Association Conference
    • /
    • /
    • pp.163-164
    • /
    • 2001
  • 휘발성유기화합물(VOCs)과 포름알데히드(HCHO)의 발생원은 매우 다양할 뿐만아니라 주변환경과 인체에 미치는 영향이 매우 크다. VOCs와 포름알데히드의 발생원으로는 크게 인위적인 발생원, 자연적인 발생원, 실내에서의 발생원으로 구분할 수 있다. 현대인들의 하루생활 중 80%이상이 실내에서 이루어지고 있어 실내에서의 발생되는 오염물질에 대한 특성파악과 적절한 제어방안이 요구된다. VOCs와 포름알데히드의 발생원중에서 실내에서의 발생원으로는 여러 가지가 있으나, 신축건물과 리모델링에 사용되는 건축자재에서의 방출은 매우 크다고 할 수 있다. (중략)

  • PDF

Influence Diagrams를 이용한 방사선 누출/피폭 최적화 방안평가

  • 제무성
    • Proceedings of the Korean Institute of Industrial Safety Conference
    • /
    • /
    • pp.460-465
    • /
    • 2000
  • 원자력 발전소의 중대사고는 비록 발생 확률은 매우 낮지만 사고 발생시 결말 효과가 크기 때문에 TMI 사고나 체르노빌 사고 이후 이에 대한 연구는 활발하게 진행되고 있다. 방사성 물질이 일단 환경으로 방출된 이후에 인체 및 환경에 영향을 미치는 주요 변수로는 풍향, 풍속, 강수량, 대기안정도로 대표되는 기상 조건과 방사선원 및 방출 고도, 열 함량, 방출 시간 등과 같은 방사선원 방출 특성에 관한 여러 가지 많은 변수들을 고려하여야 한다.(중략)

  • PDF

Characteristics of pollutant emission from wallpapers - Around TVOC and HCHO - (벽지에서 발생되는 오염물질 방출특성 - TVOC와 HCHO를 중심으로 -)

  • Jang, Seong-Ki;Kim, Mi-Hyun;Lee, Hong-Suk;Lim, Jun-Ho;Jang, Mee;Seo, Soo-Yun
    • Analytical Science and Technology
    • /
    • v.18 no.6
    • /
    • pp.542-551
    • /
    • 2005
  • This study is to investigate the characteristics of emission concentration according to wallpaper sort and emission time using small chamber method. The target compounds included 45 VOCs and formaldehyde, which were respectively determined by adsorption sampling and thermal desorption coupled with GC/MS method, and by sampling in DNPH cartridge and HPLC method. The emission factor of TVOC and HCHO was detected to $1.1mg/m^2{\cdot}h$ and $0.01mg/m^2{\cdot}h$ respectively, and the wallpapers of 25 satisfied emission standard. TVOC emission factor appeared in order of the concentration of PVC, natural, and Non-PVC wallpaper, while HCHO was detected very low concentration without relation to wallpaper sort. The paraffin hydrocarbons appeared to be the most contributable class of hydrocarbons in terms of their concentrations, followed by aromatics, and olefins, halogenated hydrocarbons was not detected. PVC wallpapers plentifully emitted TVOC above other wallpapers, and toluene was showed higher concentration of 10 times than natural wallpaper. In addition to, emission factor according to elapse was gradually decreased.